Table of Contents
If you are familiar with PHP, where you can use the in_array() function to search value in the Array, and it returns the Boolean value ( TRUE or FALSE ) to Check if values are exists in Array.
There are inbuilt methods in jQuery and JavaScript that return the index position of the value which you can use for the search.
- how you can check whether an Array already contains a specific value or not.
- This requires within the program in some cases like –
- Stop new value from insert if it already exists in an Array.
- Execute script when the Array contains the particular value.
Methods used to Check if values are exists in Array:
- Loop
- indexOf()
- inArray()
1.Loop
- First start with a loop.
- You can easily find the value within an Array by traversing on the Array and check for the value.
Completed Code
Output:
For making your searching process simpler you can use jQuery and JavaScript inbuilt function to Check if values are exists in Array
2.Array.indexOf()
- It is a JavaScript method that returns the index position of the value. If it doesn’t find the value then it returns -1.
- It works both with string and an Array.
Syntax :
Completed Code:
Output:
3.jQuery.inArray()
- It is a jQuery function that returns the index position of the value when it finds the value otherwise -1.
- It also works with string and an Array.
Syntax:
Example:
Output:
4.Conclusion
- Some of the methods which you can use to search your value in the existing Array. Using this you can remove or replace the duplicate values.
- If you are using jQuery within your project then you can simply go with inArray() method otherwise you can indexOf() method.